Extractor for tuyeres and tuyere coolers



April 3, 1928 Filed March 1. 1927 3 Sheets-Sheet 1 INVENTORS ge J. Jones Dlamnzne Gear ATTORNEY.

April 3, 192a. 1,665,135

G. J. JONES ET AL EXTRACTOR FOR TUYERES AND TUYERE COOLERS Fil March 1, 1921 s Sheets-Sheet 5 Q 6 ma S; o

' lmgvrons George J. apes E. J. Blammmg g BY - 5 ATTORNEY.

- showing Patented Apr. 3, 1928.

GEORGE .T. JONES AND EDWIN OFFICE,

J. BLANNING, OF NEW CASTLE, PENNSYLVANIA. 4

EXTRACTOR FOR TUYEnns AND TUYERE coonnns.

Application filed March 1, 1927. Serial No. 171,793. I

The object of the invention is to provide a simple, cheap and effective device by means of which tuyeres or tuyere coolers employed in blast furnaces, or bushings of whatever kind may be readily removed where ordinarily held frictionally in place, without damage to the part removed or damage to the furnace wall at the opening designed to receive the tuyere and tuycre cooler; and to provide a puller or extractor by means of which an effective gripping action is applied'on the inner periphery of the bushing or tuyere or tuyere cooler, increasing in force as the pulling or extracting operation progresses.

With this object in view, the invention consists in a construction and combination of parts of which a preferred embodiment is illustrated in the accompanying drawings;

wherein:

Figure 1 is a side elevational view of the invention shown inoperative position, a portion of the wall of a blast furnace and the tuyere and tuyere cooler being shown in section.

Figure 2 is an end elevational view of the tool.

F igure' 3 is a detail sectional view on the plane indicated by the'line 3-3 of Figure 1.

Figure 4 is a sectional view on the plane indicated by the line 4l-l of Figure: 1.

Figure 5 is an elevational view of a modified form of extractor.

Figure 6 is a view similar to Figure 1 the invention applied for the extraction or pulling of the tuyere cooler.

Figures 7 and 8 are respectively sectional views on the planes indicated by the lines 7-7 and 88 of Figure 6.

The invention is designed to make it possible, in the extraction of tuyeres' and tuyere coolers, or bushings of any kind where it'is not possible to apply a-pull on the end of the bushing to exert a gripping force on the inner periphery of the bushing or tuye're and to apply the pulling force directly axially of the bushing or tuyere. To this end the invention comprises a dolly bar 10 of uniform diameter for the greater portion of'its length as indicated at 11 but of'progressively increasing diameter as indicated at 12, to provide a tapering forward portion terminating in a head 14. 'On the tapering portion 12 the gripper is slidably mounted, this gripper being formed with a central bore which permits free sliding movement of the gripper from the head 14 to a collar 16, the latter being mounted on the tapering portion 12 and retained in fixed position thereon by a pin 17, the latter extending diametrically through the collar and through the tapering portion of the dolly bar. The gripper 15 is formed with a hub portion 18' counterbored to receive the collar 16, the hub being formed with diametrically disposed axial slots 19 communicating with-circumferential slots 20, so that when the hub is seated on the collar the protruding ends of thepins 17 may enter the slots 19 and later enter the slots 20 by relative angular movement between the gripper and the dolly bar. Obviously when the pin is engaged in the slots 20, the gripper is locked in engagement with the collar 16 and the gripper is then at the smaller end ofthat portion of the dolly bar which it is capable of traversing. f

The gripper is providedv with a plurality of uniformly spaced jaws 21 mounted for radial movement by means of shanks 22 slidably engaged in radial holes 23 forinedin the gripper and limited in radial movement by stop screws 24. threadingly engaged with the head and having pilots 25 entering slots 26 in the shanks 22. The inner ends of the shanks 22 abut the tapering portion of the dolly barand are shaped to conform thereto. the outerfaces of the jaws 21 being serrated or toothed as indicated at 27 to provide gripping teeth to effect biting engagement on the inner periphery of the bushing or tuyere to be extracted, such as the tuyre 28 illustrated in'the' drawings. When the gripper is'engaged with the collar 16 and interlocked therewith by the engagement of the pin 17 in the slots 20', the jaws may occupy their innermost positions, so that the dolly bar may be employed for inserting the gripper in the tuyere 28 down to the point where'there is slight frictional engagement between the faces 27 of the jaws 21 with the inner periphery of the tuyre 28. Then a slight angular or turning movement of the dolly barwill bring the pin 17 into regist'ration'with the slots 19, when relative angular movement between the dolly bar and the gripper'is possible. The jaws, however, having slight frictional engagement with the tuyere are, when the dolly bar is withdrawn, forced into firm biting engagement with the tuyere because of the wedgin action of'the tapering portion of the dolly of the dolly bar and engageable with an abutment 29- secured to the dolly bar adjacent the end remote from thehead M. The impact member is provided with flexible hand actuating means consisting preferably of steel cables engaged with the impactmember and looped as indicated at 31 tel provide hand grips. The members 30 are disposed ondiametrical ly opposite sides of the impact member and thus may be held by two workmen who may readily apply a sudden pulling-force to the impactmernber,

sliding it alongthe straight portion 11 of the (lolly bar until it engages the abutment 29?, the impact member being then drawn back from theabutment a second blow appliedthereto in the same manner; Since the jaws in the gripper are actuated by the tapering portion of the dolly bar, each blow applied: to the abutment tends'to increase the gripping action and thus prevents slfiipr pingand the continuation of: the application of blows withdrawal of thetuyere.

Where the application of'thepulling force is to be gradual, that form of the inventionv illustrated in Figure 5 is employed. In thisform 0% the inventiomthe gripper and the era-operating parts at the dollybar are of the same form as" shown in Figures 1 to t inelusive but the rear end of the bar is thread ed as indicated at 32 for the reception at a nut 33 provided with radial arms 34 by means of which it may be readily turned.

The threaded portion of the dolly bar serted.

107" extends through a centralopening in the spanner bar 85', the l'atterbeing disposed in spanning relationdiametrically of the wall opening in; which the tuyere cooler is in- The nut33 engages the outer face or the spanner bar anl as the nut is rotated, axial movement is thus imparted" to the dolly barIO with the same results as are secured V with thedoll ybair 10 in which axial move ment' is; effected by means of the impact member and abutment.

In the cxtractionofthetu-yere cooler 36, a; pair 37 is employed, the latter having slots 38' cut in from the periphery at diametrically opposite sidestoprovide clearance spaces for the webs 39 0115 the tuyere cooler. By means-ot'the slots 38 Is possi the abutment finally effects the positions,

ble to insert thepull plate'in the tuyere V cooler behind the webs, after which a slight angular or turning movement will shift the slots out of registration with the webs It is preferable that the-turning movement be at least Qtldegrces.

The pull plate is provided with a center slot ett) through which the T-head ll of the dolly bar 10 may be inserted, subsequent angular or turning movement of the dolly bar el' fiectin'g an interlock between thc hea d and theplate.

The plate is hold in firm engagement with the inner edges ot the webs 39' by means oi bolts 42, the latter being disposed on diametrically opposite sides of the: dolly bar and provided with nzuts l3 abutting a clamp plate td, spanning the opening: in the turna'cewall in which the tuye-re cooler is received. The bolts &2 pass througi the clamp bar" anditho dolly bar has a sliding engagement with the clamp bar. i

he dollyban 110 impact member 28 engageablei wan the abutment? 29'. i i

Since the tuyere cooler; is of tapering form,

but slight axial movement is necessary to loosen it and therefore the clamp and holts 42' maintain; their: position without the necessity for having, to ti ghten the nuts,

until the tuyere cooler is removed by hand.

The invention having been described, what is claimed asnew and usefulisa V p 1. A tool for the purpose indicated comiprising a gripper provided with: radially movable jaws, a dolly bar on which the gripperis slidably mounted and which has means for effecting radial? movement otthe jaws upon relative axial movement of the bar and gripper, relcasablevmea-ns ionlock- 7 ing the gripper at a pointon the bar vvhere the gripper jaws have their inmost radial and means for imparting" axial to the dolly bar.

looses enough to be movement 21 A tool for the purpose indicated com- 1 prising a dolly bar, a: bushing engaglng element carried? at one end of, the dolly bar, and means for imparting axial movementin ter mittcntly to the dolly bar consisting of an impact element slidably mounted upon the dolly bar and a fixed abutment on the. dolly bar with which said impact element engages, the impact element having flexible actuating means;

3L A tool for the purpose indicated com prising a dolly'bar, a bushing engaging: cle ment carried at one end of the dolly bar, and, means for imparting axial movement inter mittently to the; dolly bar consisting of an impact element slidably mounted upon: the dolly: bar and a fixed abutment on the dolly barwith which said impact elementengages, the impa-ct element having flexible actuating is. otuniform: diameter" throughout its length, carrying the sliding means consisting of cables secured to it at diametrically opposite sides and provided at their free end with hand holes.

4. A tool for the purpose indicated comprising a dolly bar provided at one end with a head and at a fixed point behind the head having a collar, that portion of the bar be tween the head and the collar being tapered, a gripper slidably mounted on the bar between the head and the collar and provided with radially movable jaws having shanks in sliding engagement with the tapered portion of said bar, the gripper and said collar having an interlocked connection releasable upon relative angular or turning movement between the gripper and the bar, whereby the gripper may be positively retained against the collar to secure the innermost position of said jaws, and means for imparting axial movement to the bar.

5. A tool for the purpose indicated comprising a gripper provided with radially movable jaws, a dolly baron which the gripper is slidably mounted and which has means for effecting radial movement of the jaws upon relative axial movement of the bar and gripper, and means for locking the gripper at a point on the bar where the gripper jaws have their inmost radial positions, said means being actuable upon relative angular or turning movement between the bar and gripper.

In testimony whereof they afiix their signatures.

EDWIN J. BLANNING. GEORGE J. JONES. 

